<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var arr = [75,95,63,86,89,92]
        var max = min = arr[0];
        for (var i = 1;i<arr.length;i++){
            if (arr[i] > max) {
                max = arr[i];
                console.log(max)
            }
            if (arr[i] < min){
                min = arr[i]
                console.log(min)
            }
        }

        console.log(`班级中最高分为${max}`)
        console.log(`班级中最高分为${min}`)
    </script>
</body>
</html>